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Time and work ( Some questions )

Oct

26

2012

Time and work
There are some questions on the topic Time and Work . The students are advised to post their answers in the comment box .

1)A can complete a work in 30 days and B can complete the same work in 25 days , then in how many days will A and B together will complete the work ?
A . 11/150 days b . 150 /11 days c ) 55 days d ) 1 / 55 days
2) A can complete the work in 12 days and A and B both can complete the same work in 9 days . How many days will it take B to complete the work ?
a. 24 days b) 1/24 days c ) 36 days D ) 1/36 days

3 ) A and B complete a work in 2 days . B and C complete the same work in 8 days and C and A complete the work in 6 days . In how many days B alone can finish this work ?
A . 24 days B . 32 days c. 40 days d . 48 days . E none of these

4 ) A is twice as good a workman as B and together they finish a job in 14 days . The number of days which A will take to complete the work is
a) 20 days b) 21 days C)28 days D) 42 days

5) A and B can do a piece of work in 72 days ; B and C can do the same piece of work in 120 days ; A and C can do it in 90 days . In what time can A alone do it ?
a) 80 days B ) 100 days C) 120 days D ) 150 days
6) A is twice as good as B as a workman . They both together finish a piece of work in 18 days . In how many days will A alone complete the work ?
a) 54 B ) 27 C) 36 D ) 72
7) A can do a piece of work in 7 days . B can do the same work in 14 day and C can do the work 28 days . In how many days will all together complete the work ?
a) 3 days b) 4 days C ) 10 Days D ) 5 days
8 )A man can do a work in 5 days but with the help of his son he complete the work in 3 days . In how many days will his son complete the work if he do it alone ?
A ) 6 ½ b ) 6 days c) 7 ½ d) 7days
9 ) x can do a work in 40 day. He do the work for 8 days then Y comes and he complete the remaining work in 16 days . In how many days B can complete the full work ?
a. 13½ b ) 20 c) 10 d) 23
10 ) A can do a piece of work in 80 days .He works for 10 days and then B alone finishes the work in 42 days . In how many days A and B together can finish the work ?
a)20 days b) 48 days C )30 days d) 40 days
11) A and B together can finish a work in 30 days .They worked together for 20 days and then B left . After another 20 days A finished the remaining work . In how many days A alone can finish the job ?
a) 40 days B ) 50 days C )60 days D ) 90 days
12 ) 12 men complete a work in 9 days . After they have worked for 6 days , 6 more men join them . How many days will they take to complete the remaining work ?
a) 2 days b) 3 day c) days D) 8 days
13 ) 10 men and 15 women together can complete the work in 6 days . It takes 100 days for one man to complete the work . How many days will be required for one women alone to complete the work ?
a) 90 b) 225 c) 125 d) 100
14 ) Twenty women can complete a work in 16 days . In how many days will a single women can complete the same work ?
A)240 B.320 3) 480
4) 120
15) Sixteen man can do a piece of work in 15 days .In how many days will a man alone complete the same work ?
a)120 b) 240 c) 360 d) 120
16 ) 10 women can complete the work in 7 days and 10 children take 14 days to complete the work . How many day will 5 women and 10 children take to complete the work ?
a) 5 b ) 4 days c) 7 days d) 10 days
17 ) If 3 men or 6 boys can finish a work in 20 days , then 6 men and 8 boys finish the work in
A 9
b11 c)12 d) 6
18 )6 boys and 4 girls together complete a work in 5 days . The same work is done by 10 boys in 5 days . How many girls will be required to complete the work in 5 days ?
a) 20 b) 10 c) 15 d) 12
19 ) If 5 men and 8 boys can complete a work in 15 days and 5 men and 3 boys in 20 days , then 12 boys can complete the same work in
A ) 15 days b ) 20 days C) 25 d ) 36
20 ) The efficiency of doing a work of A and B is in the ratio of 4 :5 . If A can complete this work in 15 days then in how many days will B take to complete the work ?
a) 8 days b) 10 days c) 20 days d) 12 days

In: Maths Asked By: [155 Blue Star Level]
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